Please help me if you can. Please also write how you got the answer thank you.

A) 8-2=

B) 8-2=6, therefore bob is 6, and we know that this answer is correct because 6+2 is 8, which means bob is 6 and his little sister is 2.

((8-2)÷2)+ 2=5   Bob is 5

Step-by-step explanation:

together they are 8 years old but Bob is 2 years older, so first subtract 2 which is equal to 6. Then divide 6 by 2 because there are two of them (Bob and Alice) which is equal to 3 which is Alices age, while bob is 2 years older, which means 3+2=5. To check you can add 3+5=8